diff --git a/IPython/Release.py b/IPython/Release.py
index 23d7b41..d49b2e0 100644
--- a/IPython/Release.py
+++ b/IPython/Release.py
@@ -22,9 +22,9 @@ name = 'ipython'
 # because bdist_rpm does not accept dashes (an RPM) convention, and
 # bdist_deb does not accept underscores (a Debian convention).
 
-revision = '3001'
+revision = '45'
 
-version = '0.8.3.svn.r' + revision.rstrip('M')
+version = '0.8.3.bzr.r' + revision
 
 description = "An enhanced interactive Python shell."
 
diff --git a/tools/update_revnum.py b/tools/update_revnum.py
index 7191114..b405036 100755
--- a/tools/update_revnum.py
+++ b/tools/update_revnum.py
@@ -4,7 +4,7 @@
 import os
 import re
 
-rev = os.popen('svnversion ..').read().strip()
+rev = os.popen('bzr revno').read().strip()
 
 print "current rev is",rev
 assert ':' not in rev